{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["DNA", "protein", "cell type", "cell line"], "input": "An attempt was also undertaken to use a cell harvester for the separation of cells from unbound ligand."}
{"DNA": [], "protein": [], "cell type": [], "cell line": []}